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Tutorial

ime-Pressure Dispensing

TIme pressure dispensing is the most common dispensing method used today.

Its popularity stems from the need for process control and the fact that it is

possible to dispense from disposable containers without the need for cleaning.

Our time-pressure dispensers deliver a measured amount of air pressure, for a

measured amount of time, to a pre-filled syringe barrel. This controlled shot of air

pressure forces material out of the delivery end of the barrel, through a

dispensing tip, and out to the application surface.

Factors Affecting Dispensing

• PRESSURE: Increasing fluid pressure will

increase dot size and vice versa

• TIME: Increasing dispense time will increase

dot size and vice versa

• DISPENSING TIP SIZE: Larger inside diameter

(orifice) needle results in bigger dot size

Basic Dispensing Guidelines

• SMALL SHOT SIZE = small dispensing tip,

low fluid pressure, short dispense time

• LARGE SHOT SIZE = larger dispensing tip,

higher fluid pressure, longer dispense time

• LOW VISCOSITY FLUID = small dispensing

tip, low pressure, time as required

• HIGH VISCOSITY FLUID = larger dispensing

tip (tapered dispensing tip recommended),

high pressure, time as required

• Position syringe barrel at 45º angle

• Position the dispensing tip close to the

work surface then activate the dispense

cycle and keep the syringe barrel in the

same position until the cycle is completed

• If vacuum “suck-back” is needed, use only

enough vacuum to draw back fluid into the

dispense tip. Excessive vacuum could

draw air into the fluid and also could draw

fluid into the dispenser.

Viscosity Chart

Material Viscosity (Centipoise)

Water 1

Milk 3

Castor Oil 1000

Maple Syrup 5000

Honey 10000

Chocolate Syrup 25000

Ketchup 50000

Sour Cream 100000

Peanut Butter 250000

Shortening 1200000

Shot Size Chart

Dot Diameter Dot Volume Dot Size (actual)

0.010" (0.25mm) 0.0000043 cc

0.020" (0.51mm) 0.00003 cc

0.030" (0.76mm) 0.0001 cc

0.040" (1.02mm) 0.0003 cc

0.050" (1.27mm) 0.0005 cc

0.060" (1.52mm) 0.0009 cc

0.070" (1.78mm) 0.0015 cc

0.080" (2.03mm) 0.0022 cc

0.090" (2.29mm) 0.0031 cc

0.100" (2.54mm) 0.0043 cc

TS5620

Diaphragm Valve

TS5540

Spray Valve

TS5322

Mini Spool Valve

TS5000DMP

Rotary Valve

TS5420

Needle Valve

TS5440

Microshot Needle Valve

TS1212

Pinch Tube Valve

TS941

High Pressure Spool Valve

TS7000

IMP Rotary Valve